'Post' in the Bible

For this is what the sovereign master has told me: "Go, post a guard! He must report what he sees.

Then the guard cries out: "On the watchtower, O sovereign master, I stand all day long; at my post I am stationed every night.

I post watchmen on your walls, O Jerusalem; they should keep praying all day and all night. You who pray to the Lord, don't be silent!